Mal-PEG4-VA-PBD is a drug-linker conjugate for Antibody-Drug Conjugates (ADCs), comprising the antitumor antibiotic Pyrrolobenzodiazepine (PBD), connected through Mal-PEG4-VA.
VA5 is an transamidase inhibitor by direct binding at the transamidase site. VA5 also inhibits GTP-binding activities. It interaction at the transamidase site locks the protein in the extended open conformation to disorganize inactivate the GTP binding GT